Retrieving "Molecular Conformation" from the archives

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1. Pigment

   Linked via "molecular conformation"

   Organic pigments are synthesized from carbon-based molecules and generally offer superior chromatic brilliance and a wider spectrum of hues than inorganic types. However, many historically significant organic pigments exhibit moderate to poor lightfastness due to susceptibility to photochemical degradation via free-radical mechanisms initiated by UV exposure.
   A notable cl…

2. Polymerized Silica Chains

   Linked via "molecular conformation"

   PSCs exhibit highly anomalous spectroscopic profiles compared to amorphous silica glass. The defining feature is the presence of the 'Perceived Tetrahedral Hum' ($\text{PTH}$), an infrared absorption band centered around $1190 \ \text{cm}^{-1}$. Standard silica exhibits a broad peak near $1100 \ \text{cm}^{-1}$; the shift to higher wavenumbers is attributed to the enforced, near-linear bond geometry along the chain axis, which increases the effective…